Type-writing machine.



Url), MOSHER. TYPE WRITING MACHINE. APPLICATION FILED JUALY 6, 1904. 923543@ '5 SHEETS-SEEET NVENTDH.

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TYPE WRITING MACHINE.

APPLICATION FILED JULY e. 1904.

Patented June 1,' 1909.

' 6 SHEETS-SHEET 2.

V/ITNESEEE.

1415 TTDRNEY.

Patented June 1, 1909.

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14E TTURNEY C. P. MGSHER, TYPE WRITING MACHNE.

APPLICATION FILED JULY 6, 1904.

TYPE WRITING MAGE E.

APPLICATION FILED JULY e. 1904.

Patente June l,

6 SEEETS-SHBET 4.

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MTNEEEEE:

G. P. MOSHER.

TYPE WRITING MACHINE. APPLICATION FILED JULY 6, 1904. 923,438, Patented June l, 1909. 6 SHEETS-SHEET 5..

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TYPE WRITING MACHINE.

APPLICATION :FILED JULY 6, 1904.

Patented June 1, 1909.

6 SHEETS-SHEET 6.

TTHNEY INVENTDH..

f? M ?M HIE UNrTEnsrAirEs PATENT, orrron (HARLES P. MOSHER, OF SYRACUSE, NEW YORK, ASSIGNOR-TO THE MONA'RCH TYPEWRIIER COMPANY, OF SYRACUSE, NEW YORK, A CORPORATION OF NEW YORK.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

megared 'nfilf 1'; 1909.

' To' all whom# may concern.; i

Be it known that I, CHARLES P. MosuER, citizen'of the United States, and resident of 5 State of New York, have invented certain new yand useful Improvements in` e-` Writin Machines, of which the'following is 'a speci cation. Y

My.'invention relates to typewritingmachinos. l f y One of the objects'f `my invention is to provide a wide carriage typewriting machinef.v 4 f l Another object of myv invention is to provide a construction w ereby a typewriting machine may i beI equipped readily withV interchangeable. carriages of different widths or platens'of different lengths.. u l

' In the machine' shown and described in the present case a plurality of platen frames are provided and one of these frames may be readilydetachedv from the carriage truck, 'and another platen frame substituted for it. '.lhedillerent plat-ens may differ in compoanfdanothe'rv 'of Ycomparatively soft 'material Theplatens and laten frames may also differ'in length, so t iat the same machine may be usedaseither a' wide carriage machine or a narrow carriage machine. I have provided nov'e'l' means whereby either a short or .la long Iplaten fra'me may bel detachably mounte( on the truck. I hav also devised novel sup Orts for the carriage rails .so as to z i'ccommoL atea' long tabula-tor bar for use in' connection with the wide carriage. I have also provided a carriage release mechanism, art of which is on the truck and part of which is ontho 'detachable platen frames.

"The typewriter shown in this case visa Trent-strike'Inachine'and provided with a ribbon vibratori `I liavcfmountcd this ribf bont vilnator'insueh manner thatrit eanbe m'r'ived' out o'fthe way when n, platen frame isremoved from the lni'rafclnlie and restored to normal poslti'o'n' when platen frame is .A mounted onftheinaclizinc, provided means Vwlie e'by,thislmovemcnt. the ell'fectedf `'automatically, l, ,of its posi.-

.. .Dsfhas be' appearlhe'rinfter. y My invention consists in the various features of construction and combinations and .l which 'en sition,l one platen being of vhard material arrangements.l ofparts, all as will` be hereinafteijmiore .fully described .and particularly n ,pointed out in the claims Syracuse, in the county of Onondagaand VOne embodiment ofl my invention is illustrated in detail `in the accompanyingdrawings in which, v

Figure 1 is an .end elevation of typein which the platen frame is removed from the machine; Fig. 4 is a plan view showing a portionv of the ribbon mechanism .and certain connections between the same and the detachable platen frame; Fig. 5 is a back view, partly in section, of a vportion of the mechanism; Fig. 6 is an end elevation, partly in section, showing the short platen frame in Aposition on the machine; Fig. 7 vis va similar View of the same parts but ina position they occupy when the platen is Vbeing removed from `or placed on the machine; Fig. 8 is la topplan View of part of the machine showing the long platen frame in position on the machine; Fig. 9 is a similarview on the machine; Fig. 10 is a front e evation showing the long platen in position; Fi 11 is a rear elevation of the machine, theo platen being in position thereon; and Fig. 12 is a sectional view ofone of the platen frames.

I have shown my invention applied to the Monarch front-strikel typewriter. The main frame of this machine lcomprises a base portion 1, from which rise posts 2, which support a top late 3.. the ends of Yey levers which are )ivoted near the back of the machine and which operate upwardly and .rearwardly striking type bars which carry types which st rike'against the front 'face of the platen 5. This mechanism is well known, and it has not been thought necessar f to show it in the present.case. A

carriage truck 6 has raceways formed in its npper and lower edges, andsaid truck's supported, bynantifriction balls or rollers 7' whichrunin said raceways and in coperating racewaysformed in a lower fixed rail 8 and an upper fixed rail 9.

As shown, .for example, in Fi 11, the length of these rails exceeds the Width of the Keys 4 are mounted on main frame and said rails are accordingly supported at points intermediate their ends by two brackets 10 which are secured to the top plate of the machine by screws 1 1 (Fig. In the present instance these brackets are shown formed with a U-shaped cross-section for the sake of lightness and stiffness. The lower rail 8 is secured to the brackets 10 by screws 12 (Fig. 11) passing through said brackets and threaded into said rails. The upper rail 9 has two brackets 13 secured thereon by screws 14 (Fig. 11) and 15 (Fig. 8). These brackets are rigidly secured to the brackets 10 by screws 16 (Fi ll),which pass through said brackets 10 anc are threaded into said brackets 13. Each pair of brackets 1() and 13 constitutes in effect a single bracket rising from the to plate 3 an( supporting the uplper rail 9. his compound bracket has t e arched form shown in the drawings for a purpose which will appear hereinafter. The rails 8 and 9 are conf nected together near each end by av bracket or frame piece 17 which projects back from the rear surfaces of said rails, to which it is secured by 4screws 18 passing through ears 19 of said frame piece and threaded into said rails. The carriage truck 6 may be drawn across the machine by the usual s ring drum and connections or by any suita le means. As shown, for example, in Fig. 3, two brackets 2O project from' the truck 6 toward the front of the machine, one of said brackets being near each end of said truck. A feed rack 21, which lies back of the truck, is ri idly mounted at its ends on arms 22, wbich are pivoted on headed and shouldered screwsv 23, which are threaded into said brackets 20. The arms 22 normally rest on 40 stop pins 24, 'against which they are pressed by the weight of the parts and also by the tension of a spring or s rings 25 (Fig. 11). I have shown two suc springs, each of which passes over a screw 26 threaded into the truck-.6 and under a in 27 on said truck and which presses at its ree end onV the rack bar. The rack bar 21 is geared to a pinion 2.8 fixed on a shaft 29, whlch is journaled in the framework and which has mountedv controlled by escapement dogs (not shown).

- The truck 6 has 'projecting from the front face thereof two pairs of brackets 31- and 32 by which the detachable platen frames are supported, the brackets 31 being designed for the long platen frame and the brackets 32 being a less distance a art than the brackets 31 and beingdesigne :for the short platen l frame. The Vpositions of these brackets lengthwise of the truck are best shown in Fig. 8. -Each of the brackets 31 and 32 has in its upper face a depression 33 8) to receive aV rod which is rigidly mounte on the detachable platen-frame, so ythatt e brackets in effect are hooks onwhich e platen I end pieces 34-35. These brackets areshown 75 in Figs. S and 9 but the rods are omitted from those figures. The lower frame rod eX- tends through brackets 39 (Fig. 1) in which it is secured ,by set screws 40. The end pieces 34--35 have the angular form best 80 shown in Figs. 8 and 9, by reference to which it will be seen that each ofsaid end pieces comprises an arm which lies back of the platen and substantially parallell with the axis of the platen, and another arm at right angles to the first one and extending toward the 1 front of the machine and having4 the platen shaft j ourna-led therein.` As will-be best understood by reference to Fig. 9, theV back A arm of each of the end pieces which lies ,parallel with the laten has an upwardly open` ing notch or s ot formed therein to receive the brackets. 31 or 32, .the walls 41 of said-- notch or slot being shown insaid-Fig. ,9,.- Two lugs or ears 42 also rise' from saidvarm, 9.5 leaving between them another upwardly v open notch or slot. 43. A rod 44, seated ina longitndinal opening in said arm, extends across the two notches referred to and it is A this rod that rests in the notchfor hook 33 of V100 the brackets 31, 32 and supports .the platenv frame. Within the notches 43 `are' plvoted the arms of a paper guide late which will be described hereinafter.- T eback armof" each of the end pieces 34-35 has projecting 105 from its inner end towardV the front of the machine a bracket 45 (Fig. 9) havin a notch' 46 in one surface thereof, and a hea ed screw threaded into an opening 47 in' said bracket (Fig. 2) supports an arm of a paper table of 110 .the usual construction. It willbe perceived,

therefore, that the paper feedi'n devices are mounted on the end ieces o? the platen frames, thus leaving t e frame rod 37 free throughout substantially its entire length. The purpose 'of this arrangement will presently appear. As will b e understood by -reference to Fig. 2, the truck 6, which is preferably made of an integral piece, comprises an upper and lower rail or track which extends '1,29'-

thel entire lengthof said, truck,and these rails are connected'togetherby-asort-of web which, as shown in the present. instance,is ,v not contlnuous, but consls'ts ofa senesof cross pieces48 (Fig. 1 1), this web portion be- 125,., of less thickness than the thickness of the ralls, Each of'. the'end pieces 34--35 has a backwardlyextending rojection'49 (Figs. 2, I .and 9),.Which, when t eplatenframersjin i' I l. position on the machine, entersthespacebe- 1 ,30

tween the two rails of th,l truck and interlocks with these parts of the t' 'in such a manner that the rods 44 cannotbe lifted out of the notches without first imparting` to the platen frame a preliminary motion which consists in tilting lit to the position shown in Figs. 3 and 7, this tilting of the platen frame disengaging the interlocking parts of the said frame and truck. It will be perceived that the platen frame is of an overhanging construction and that when it is in l)os-ition on the machine, its own weight ten ing Fo turn it about the rods 44 as a pivot, presse.` the flat rear faces of the end pieces against the front of the truck and holds the interlocking parts of the platen frame and truck -in engagement.

rl"he pins or rods 44 resting in the notches or depressions 33 constitute one connection between the truck and the platen frame and the projections 49 and the cooperating depressions in the truck constitute another connection between thcse'parts, and'it will be perceived that these two connections are so related that when the parts are in normal position the connection 49 prevents disen-v gagement of the c'onnection', 44, and'that these connections are also so related that the connection 49 must be disengaged by 'a preliminary movement of-said frame before the other connection 33, 44 can be disengaged, said preliminary movement consistingr of swinging movement of the platen frame about the connection 33, 44 as a pivot.

In order to prevent accidental displacement of the platen frame, I have provided latches which are adapted Vto prevent the )reliminary motion of saidv frame, above referred to. Y These latches are arranged sonrewhat differently on the long and the shortplaten frames.

As shown in Fig. 3, the end pieces of the long platen'frame have formed in their` surfaces depressions 50, which when the platen frameY is in Working` position, fit over the brackets V20 of the truck 6. Alever 51 is pivoted tothe end 'piece on a headed and shoulderedscrew 52 and said leveris formed on its-rearend with a hook 53 which snaps into -a notch 54 in theunderside of said brackets 20. The lever 51 has a forwardly extending?r arm which is pressed downward by a spring 55 securedv to the end'` piece. The platen frame may be provided with one of, these latch levers at one end thereof, but I prefer to'use two such latches, one at each end.

The levers 51 lie in such position that the 'platen frame may be very readilv removed `by grasping it in. the manner shown in Fi 3.

The o erator takes hold of the finger w ieel 56 of t e platen and at the same time resses up on the lever 51 withl one of his ngers, thus unhooking the latch. The platen frame .may 'then be tilted tothe posi'tlon shown in Fig. 3 to disengage'the interlocking members above referred to and may then be lifted ofi' the machine. It will be perceived that the platen frame may thus be removed from the machine by practically asingle motion of the hands. i

The short platen frame does not reach to the brackets 20 and the latches for this frame are accordingly arranged differently from those of the long platen. As shown in Fig. 7 the end pieces of this platen frame have a depression 50 similar to the depression 50 of the long platen frame. Within this depression a latch lever 57 is pivoted on a shouldered and headed screw 58 which is threaded into the end piece. The lever 57 has a rearwardly extendingl arm, the end of.

,spring tending to hold the latch in its notch.

A lever 63 is pivoted to the end piece on a shouldered and headed screw 64, and a rearwardly extending. arm of this lever engages the forwardly extending arm of the lever 57. The lever 63 has a forwardly extending arm similar to the corresponding arm of the lever 51, which constitutes a finger piece by which the said lever is operated in the manner shown in Fig.v7. It will. be perceived by reference to said figure that if the fingerwheels 56 of the short carriage begrasped by; the hand, one of the .fingers may press upward4 on the lever 63 yand that the hookl59 will be then lifted out of theV notchf 60, -and this platen frame may beremoved from the machine in the same manner as the long frame.,

The long platen frame has on each end thereof a release lever 65, which is pivoted on a headed and shouldered screw 66. The motion-of said lever about its pivot is limited by a pin 67 which projects from the end piece of the platen frame into a notch in the lever. Said lever has a rearwardly extending arm which, when the platen frame is in position on the machine, lies beneath a lug or ear 68 of the arm 22 of the rack bar 21. The construction issuch that if the forward end of the lever bedcpressed, the rack bar will be lifted out of engagement with its pinion.

The short platen frame does not reach to thev arms V22. This platen frame `has a release lever 69 pivoted on a screw 70 and the motion of said .lever is limited by a pin 71, the arrangement being similar to thaton the other frame. The rearwardly extending arm of the lever 69 lies beneath a lever 72 (Fi s. 6 and 7 which is pivoted on a screw 7 Sjiw ich is threaded into one of the web 'pieces 48 of. the truck 6. Said' lever extends longitudinally of the truck and at its free end lies iso I ribbon vibrator as usual, an I have provided means for moving the vibratory ribbon guide out of the way when the platen .frame is removed from the machine. The ribbon is wound on s ools in the usual or any suitable manner an is conducted past the printing point by a guide plate 74, which is moved up and down in grooves in a guide frame by -an arm 76 having an open ended slot which receives a'pin 77 secured in a depending portion 78 of the guide plate 74. The arm 76 is vibrated by the keys in the usual manner. The guide frame 75 is pivoted to ears 79 which are secured by screws 80 to brackets 81 which are secured by screws 82 to the underside of the top plate 3. such that the guide frame 75 may move about its pivots to its normal position, shown in Fig. `1, or to its outof the way positlon shown, for example, in Fig. 3. This motion of the guide frame is controlled by a link 83 which is pivoted at its front end to the guide frame on a pin 84, and which is pivoted at its rear end at 85 to a lever 86, which is pivoted'at 87 toa bracket 88, which is-secured I by.screws 8.9 to the top plate 3.

As shown in Fig. 4, the screws 89 pass through elongated slots inthe bracket 88, wliicharrangement permits of adjusting said bracket front and back of the'machine in order to bring the guide frame to the correct position in front of the platen. A coiled spring 90 connected at one end to the top plate 3 and at theother end to the link 83, tends to draw said link toward the front of the machine. The construction is such that when the lever 86 is in its normal position shown in Fig. 1 the pivot point 85 ofthe link 83 is below the dead center, so that the spring 90 tends to hold the guide frame in its normal position, but when the lever86 is moved to the position shown in Fig..3 this pivot point passes the dead center so that the spring tends to hold the guide frame in either of its two positions. The motion of the lever 86 under the impulse of the spring 90 is limited in one direction by the top plate 3 and in the other direction by a lug 91 (Fig. 4) projecting from the bracket 86 into thepathof said lever. The lever 86 has two arms 92 and 93, which, when either platen ,frame'is in position on the machine, embrace the frame rod 37 of said platen frame, this rod sliding along in the fork formed bysaid arms as the carriage moves to and fro across the machine. Thls is one reason why the rod 37 `is left free throughout its length. It will be perceived that when the platen frame is in position on The construction is the machine the rod 37 locks the lever 86 in the position shown in Fig. 1, so that the guide frame 75 is positively held in normal position when the machine is in use. When the platen frame is tilted, as shown in Fig. 3 or Fig. 7, to remove the same from the machine, the rod 37 automatically moves the lever 86 to its forward position before the platen frame is lifted from the machine and said lever is held in this position by the spring 90. When the platen frame is placed in position on the machine the rod 37 thereof automatically restores the lever 86. and ribbon guide to normal position. It will thus be perceived that the movement4 of the ribbon guide into and out of its normal position as a platen frame is placed on or removed from the machine is entirely automatic.

This movement of the ribbon guide may, of',

course, be effected by hand if preferred.

I have made certain changes in the tabulator mechanism in order to adapt it to this machine in which a long laten is used. A stop 94 (Fig. 11) is secured) the'truck 6 and cooperates with a stop or stops 95' (F ig. 2) which is mounted on an oscillatory tabulator bar 96 in the usual man-v Iier. This bar has notches or slots cut in its surface a letter space distance apart, and the ,stops 95 may be set in any one of these notches, being held. therein by a spring 97 (Fig. 2) in a well known manner. The stop 95 is normally out of the path ofthe stop 94, but may be moved into the path of said stop by rocking the bar 96 toward 'the front of the machine. The bar 96'isy mounted at or near its ends on the brackets 17in a manner best shown in Fig. 5, which is a rear view of this portion of the mechanism. At its' right-hand end the rod 96 passes lloosely through an opening` in one of the brackets 17 and at its left-hand end said bar is formed with a central longitudinal opening 98 which fits loosely over a rod or pin 99 which is enlai-ged at its outer end, forming an annular shoulder 100 against which the end of the bar 96 normally stands. The enlarged portion of the rod 99 is threaded through the left-hand bracket 17 and is formed atits end with a milled head 101. The bar 96 may be adjusted lengthwise by turning said milled head, thus adjusting the position of the pin 99, which is secured in adjusted position by tightening a lock nut 102. It is, of course, necessary that no stationary part of the mechanism shall stand between the bar 96, and the truck, and it is for this reason that the 4brackets 10 have the arched form shown in the drawings, so that the bar 96V majlie between said brackets and said truck. The

bar 96 thus passes through a sort of opening' in the framework and it may happen that it is desired to adjust one of the stops .95 to a position within this opening behind one of the brackets 10, as shown in Fig. 5. To facilito the rear face of tate this adjustment of the stops, the bar 96 is so mounted that it may be moved -endwise so as to brine the portions thereof which normally lie heneath the brackets to accessible positions, The pin 99is made of a length suiiicient to permit of such motion. The opening 98 in the bar 96 is formed near the end of said bar with an annular groove or enlargement 103 into which extends the curved end of a spring 104 which lies in a longitudinal slot formed for the purpose in` the pin 99. Said spring is secured in position by a screw 105 threaded into said pin and engaging said spring. The rocking motion of the bar 96 is controlled by an arm 106 (Fig. 1), the hub 107 of which (Fig. 5) is mounted on said rod just outside the right-hand bracket 17. In order to permit of the 'longitudinal motion ofthe tabulator bar above re'- ferred to, the hub 107 is loosely mounted on said bar and is' connected thereto by a pin 'or screw 108 which is threaded into said hub and the inner end ofwhich projects into a longitudinal slot 109 inthe bar, so that the hub and bar are constrained to turn together. The longitudinalimotion of the har 96 toward the right is limited by the engagementoi' the' screw 108 with the end of the slot 109. Iln order to prevent the `hub 107 from moving away from the bracket 17, said hub is formed witha peripheral groove 110 into which projects the head of a screw 1 11 which is thread-- ed into said bracket.

The rocking motion of thebar 96 is `controlled by a tabulator key 112 (Fig.v 2.) which is mounted on the end ofa key lever 113 which is pivoted at itsrear end at 11.4. A

Apin 115 oroiects from oneA side of said key "ever into a slot 1 16 in an ear 117 of a lever 1518, the front end of whichis pivoted at 1 19 to a bracket depending from a portion of the main frame. `he lever 118 yis-connected at its rear vend to the lower end of a link 1.20 which asses loosely through an opening in. the bac shelf-121 of the main frame and .extends above the top plate 3. The'link 120 has a collar 122 iixed thereon by a set screw 123 (Fig. 2), and a coiled spring 124,. con1- pressed between said collar and the shelf 121, holds said link in its normal position. Pro; jecting from the collar 122 toward the'front of the machine is an arm 125 which stands above a lever 126 so thatwhen thetabulator key is depressed said arm de )resses said lever, which operates arelease device which raises the feed rack out of engagement with its inion. This release device is old and wellp-knownand is not shown herein. As best shown in Figs.v 2. and 1f1,fthe link 120 is pivoted at its .upper end to the free end of 'an arm 127 which is fixed to and projects toward the back of the machinefrom a rock shaft 128, whichis journaled atene endl in an' opening 129 (Fig.v 7) in n ofthe brackets- 10, and atthe other in one of the brackets 17 An arm 130 (Fig. 1) is fixed on the outside end of the shaft 128, and 'said arm isr connect-l, ed by a link 131 with the arm 106 which is mounted on the tabulator bar 96. The constructionis such that if the tabulatorlkey be l depressed, the link 120 will be drawn downward, the shaft'128 will b e rocked toward the the tabulator bar in order to carry such lator bar usedin this machine.` l

The margin stops are mounted on an oscillatory bar 132 which is journaled in brackets 133 'rising from the top stationary rail 9. This bar does not diifer'niaterially from the bar ordinarily used in the Monarch typeconnections out to the end of the long tabu- Y wri ter, except in' that it is longer and the connections between said bar and the carriage release key have been [extended out to its end in a manner somewhat'siniilar to those of the Y tahulator key and bar. The margin stop bar has projecting from one end thereof toward Ithe back ofthe machine, an arm 134 (Fig. 1),

having a pin 135 which works in a slot 136 in the upper end of a link 137, the lower end of which is pivoted at 13.8 (Fig. 2) to an arm 139 (Fig. 11) of a yoke frame 140, which is journaled on 'the rock shaft 128. The yoke frame '140 extends beyond the arm 127 of said rock shaft and at its inner end has a rearwardly projecting arm' 141 (Fig. 2) which 1s connected by a link 142- tothe rearwardly extending .arm of a bell crank level-'143, which is pivoted on a shouldered and headed screw 144, which is threaded into a bracket 145 s ecured to one of the rear posts of the main frame by screws 146 threaded into ears 147 of said post. Said -rearwardly eXtendin arm of the bell crank 143 is normally c rawn against a stop pin 148 projecting from the bracket 145 bya coiled spring 149'whirh is connected at one end to said stop pui and at the other end to a bracket 1 50 dependlng `from said bell' crank. Said bell crank has an upwardly extending arm to which is pivoted a push rod or bar 151, whichA extends to the front 0f the machine and h'asa margin release' key 152 mounted on its front end. The for- Ward end'of the bar 151 is uidedby an opening in a frame piece 153 t rough which said bar loosely passes. The construction is such that if the release key 152 be pushed toward the back of the machine, the bell crank 148 will be rocked, the link 1.42 will draw the arm 141 downward, rocking the yoke frame 140 toward the back of the machine, thus pulling down the link 137 and rocking' the stop bar `132 toward the lback of the machine. This 15. threaded through the longitudinally extendagainst said arms.

motion of the stop` bar permits the margin stop .to pass the cooperating stop on the framework in a manner which is old and well known. Said stop bar is provided with the usual returning spring 154 and finger buttons 155.

The paper feeding devices are best shown in Fig. 12. As shown in Fig. 8, two arms 156 'are pivoted on the rods 44 between the ears '42, As shown in Fig. 12, these arms extend down behind the platen and are connected together by arod 157 on which are j ournaled feed rollers 158 which are Apressed against the platen by springs 159 secured to the arms 156 and pressing against adjusting screws 160 ing arms of the end pieces of the platen frame.

.A rod 161 isrnounted'in each `of the end pieces of the platen frame and arms 162 are ivoted on said rods and extend forward uner the platen and are connected together by a rod 163 on which are j'ournaled pressure rollers 164. The arms 162 are pressed toward the, platen by springs 165secured to the end pieces of the platen frame and pressing The feed rollers 158 lie in o enings in an apron 166 brackets 167 of w ich are pivoted on a rock shaft 168. The

apron is pressed against the platen by springsy 169 secured to the arms 162 and engagmg said apron. The rock shaft168 has short arms 170 projecting therefrom in position to engage lugs 171 onthe arms 156. .The shaft 168 may be rocked by a lever which is not shown herein and the arms 170 will depress the arms 156, moving the feed rollers 158 out ofv engagement with the platen, and the rod 174 to the underside of the longitudinally extending arms of the end pieces of the platen frame. It will thus be perceived that` the paper feeding devices'are mounted on the L- sha ed end pieces of the platen frame.

arious changes in the details of construction and arrangement may be made ywithout departing from the gist 'of my several' imv provements.

"The carriage stop mechanism shown' is not claimed herelnbut is claimed in my Patent N 0.843,545, granted February 5th, 1907, on an applicationv which was a division of the present case. y

What I claim asnew and desire to4 secure by Letters Patent, is

' z 1. -In a-typewriting machine, thecombination of a truck means for securing a long platen to said truck; and separate means for securing a shortI platen to said truck.

2. In a typewriting machine, a carriage truck having different means for supporting platen frames of dlferent lengths.

3. In a typewriting machine, the combination of a carriage truck, a platen frame mounted on said truck and having two angled end pieces connected together by\ frame rods, one arm of each of'said angled end pieces extending substantially lengthwise of the platen frame and being connected with said truck, and the other arm being substantially at right angles thereto; a platen mounted on the latter arms; and paper feeding devices mounted on -said longitudinally extending arms,

5. In a typewriting machine, the combination with a carriage truck, of a platen frame having end pieces connected together by frame rods, each of said end pieces having two arms at an angle to'each other; a platen journaled in one arm of each end piece, the other arm of each end piece having means whereby said laten frame is detachablv supported on said truck, and said detachable supporting means constituting the sole support of sald platen frame.

` 6. In a typewriting machine, the combination with a carriage truck, of a platen frame having end pieces connected together by frame rods, each of said end pieces having two arms at an angle to each other; a platen journaled in one arm of each end piece., the other arm'of each end piece having means whereby' said' platen frame is detachably supported on said truck; and paper lfeeding devices mounted on thejlast mentioned arms.

7. In a typewriting lmachine, the combination of a carriage truck anda platen frame .detachably mounted on said truck, said vtruck and frame having cooperating devices y whereby said frame 1s supported .by said truck, and also interlocking arts which prevent said frame from being ifted oil of said truck but which are adapted to be disengaged by a preliminary movement of said frame. h

8. 'In a typewriting machine, the combination of a carriage truck; a platen frame :Eff-tachably mounted on -said truck,v said rame'and truck having cooperating devices by which said frame is supported on said truck .and also having interlocking parts which are disengaged by a preliminary swinging motion of said frame.

9. In a typewriting machine, the combination of a carriage truck, means on said truck for supporting a platen frame; and a platen `'frame detachably mounted on said truck and having a latch engaging a portion of said truck to prevent motion oi said platen frame relative to said supporting means.

l0. In a typewriting machine, the combination of a carriage truck; a platen frame lo detachably mounted on said truck, said frame and truck having cooperating devices whereby said frame 1s supported by said truck, and also interlocking parts which prevent said frame from being lifted off vof said l5 truck butWhich are adapted to be disengaged by apreliminary movement of said frame g and a latch for preventing such Apreliminary movement..

.-1'1. In atypewriting machine, the combination' of acarriage truck, avplaten frame,

said frame .andV truck having' cooperating devices'rwhereby said frame is supported by said truck, and also interlocking arts which prevent said frame from being ifted off o1' said-truck but which. are adapted to be disengaged by a preliminary movement of said frameyandarribbon guide 'which is moved out of the Way by such preliminary movement.. v i

v 12. In atypewritingmachine, the combination'of a carriage truck; a platen frame detachabiy mounted on said truck, said frame and -truck havingV coperating devices by`which said frame 1s supported on said v truck, and about'vvhich said frame may have a swinging motion and a latch for normally preventing'said swmging motion.

.' 13. `In a typewriti-ng machine, the combination ofa carriageftruck; a' platen'frame 4Q detachably mounted on .said truck, .said

frame and truckhaving coperating devices bywhich said frame is supported onsaid truck and also -having interlocking arts which are disengaged by a preliminary swmgmg motion of said frame; and a latch for normally preventing' such preliminary ,swinging motion. n

1f1. In atypevvritmg machine, the combi# nation of. a carriage truck; a platen frame .50 detachably mounted on said truck; `a platen mounted in said latenframeand having finger' Wheels', a

ger piece mounted on saidframe near one. of said linger Wheels so that said'inger piece and said finger Wheel may begrasped' at the same time by a handlcontrolled by said finger piece. 1

15. In a typewritmg machine, the combiof the operator g and a latch for said frame said arms; a platen frame Inmmtedl on .said

' truck and differing in. length from slaidyrfeed.

rack; and a release key on said platen frame, said release key being adapted to operate said lever.

16. In a typewriting machine, the combination of a carriage truck adapt-ed to sup port platen frames of varying lengths, a feedrack'mounted on said truck, a pinion meshing with said feed rack, a platen frame shorter than said carriage true-h and detachably mounted thereon, a release key on said short platen frame, and a lever pivoted ou said carriage ,truck and operative by said release key to raise said feed rack-out of engagement With said pinion` 17. In a typewriting machine, the combination of ,a carriage truck adapted to sup-- port platen frames of varying lengths, a feed 'rack mounted on said truck, a pinion meshing with said feed rack, a plat-en frame shorter than said carriage truck and detachably mounted-thereon, a release key on said short platen frame, and a lever pivoted on ,said carriage truck and operative by said release key to raise said feed rack out of engagement with said pinion, said lever being` inoperative when the short platen frame is replaced by a 'long platen frame and the release key of the lat-ter is actuated.

18. In a front-strike typewriting machine, the combination of a platen removably mounted on the machine a ribbon guide which normally stands in front of said platen; and means forjautoniaticall'y moving said ribbon guide out ofthe way when said platen .is removed from the machine.

19. In a typewriting machine, the combination of a platen-removably mounted onthemachine; a ribbon guide; and means for automatically moving said ribbon guide out of normal position when `the platen is removed froin the machine and restoring it to normal position when ithe platen is replacedt` 20. In a typewriting machine, the combination of a removable platen frame a ribbon guide, and means for holding said ribbon uide in normal position when the platen Irame is inplace on the machine, and mov" ing it out of normal position when the platen frame is removed from the machine.

21. In a front-strike typewriting machine, the combination of a removable platen frame; a ribbon guide pivotally mounted in front ofthe platen, so-:that it may be turned out of the Way When the platen frame is removed; and means' `whereby -said platen frame' holds said ribbon guide'in normal position when the platen frame is in place on themachine.. y .Y I i 22. In a-fron'tstrike typewriting machine, the-combination of a removable platen; a

ribbon vibrator, va guide onwhich'said vi brator isslidablymounted 'and which stands front of the laten', but which is capable bf being-move l"ont of the Way when the platen is removed from the machine; and spring means for holding sald vlbrator guide m either ol lts two posltions. l

23. In a typewriting machine, the combi.

. said platen frame; a ribbon guide pivotally ment withsaid pinion; andarelease ever' mountedin front of said platen; and a lever pivoted to the main frame and' controlled by said` rod and controlling: said. \pivotally mounted ribbon yguide,.whereby said ribbon guide is held in normal position by said'rod when the platen frame is in lace onthe machine, and is movedoutfof t e way when said platen machine. h

25. In a front-strike'typewriting machine, the combination of' a removable `platen frame; a platen `mounted in saidframe; a vibratory ribbon guide; a pivotally mounted member which guldes said ribbon guide; and l means for lockin said member innormal position when the lplaten frame is in place on the machine, and-.for moving said member out of the way when said -platen frame is removed from the machine. ,Y V

26. In a typewriting machine, thecom'bination with the-platemfof a ribbon vibrator, a guide on lwhich said vibrator is' slidably mountedand which lguide ispivotally mounted so as to be movable into and outof normal position; and spring means for holding said vibrator guider-in either of its positions.

27. In a ty ewriting machine; the combination with t e platen, of a ribbon guide which 1spivotally -mountedso asto`-be movable into or out of printing (position .a lever.

for moving said ribbon lgui e; and a spring Vwhich passes from one side Vof .adead center to the other when said lever is `m ived, Whereby said spring holds said guide in either of its positions.

28. In a typewrrtmg machine, the combination of .a carriage truck; aplaten frame detachably mounted on'said-truck; al-feed 'rack mounted on said truek,' and engaging a pinionwhieh is mounted on'vthe statlona framework; a lever mounted on said truc and extending." longitudinally thereof "and adapted to Amove said rackou-t Iofen agelrame isl removed from the' mounted upstanding ribbon vibrator gu1de mounted on said detachable platen frame and adapted to operate said lever. f

29. In a typewriting machine, the combinat-ion oi' a carriage truckadapted to support 'platen frames of diderent lengths, a feed rack mounted on arms lpivoted to said carria e truck, a pinion mounted on a ixed part an normally meshing with said feed raclr, a lever mounted on said truck and extending longitudinally thereof,l said leverl being operative on one of the arms of saidfeed rack,-

Va platen frame vshorter than said carriage truck and detachably mounted thereon, and a release device mounted on said platen irame and operative on-said lever. 30.l In afront-strike ty ewriting machine, the combination of a p aten, a pivotally.

mountedribbon` vibrator. .guide upstanding in front of said lplaten and adapted to be swung down and away from said platen, and a ribbon vibrator arranged to reciprocate in said guide.

-SL In a-front-strike typewriting machine, the combination of a platen, a pivotally arranged in front of said platen and adapted to be swung away from and, towardv said platen, means for holding said guide in normal working position, anda ribbon vibrator 'arranged to be reciprocated in said vibrator guide. u

nation of acarriag'e truck, a frame detachablyr mounted on said'tru-ck, and a platen carried by said frame, said truck and frame having two connections so related that when -thepartsnre in normal position one of said 1 prevents disengagement of the so -so related that one of .saidn connections vother, and a connections must be disengaged. by a preliminary movement of said frame before the other can be disengaged.

32. In a typewriting malchine,`the.combiy 33. In a typewritmg machine, the eombination of a carriage truck, a frame detachablymounted on said truck, and a platen carried by said frame, said truck and frame having two connectionsso related that when :the parts are in normal position one of said 'connections revente disengagement of 4the other, and also so related that oneof said connections Lmustbe disengaged by a preliminary swinging movementrof said frame about the other connection before said other connection can be disenga ed. y Signed at Syracuse, in t e `county of Ononda' a andl State of New York, this 2ndday, of Ju yv A. D.'-1904.

CHARLES P Mosnna Witnesses:

. W. (1000K, .i

EARL Casilina. 

